# Out-of-bounds read in Apple macOS and others

CVE record · `CVE-2023-28204`

- **Identifiers:** `CVE-2023-28204`
- **State:** Confirmed
- **Severity:** CVSS 6.5 Medium
- **Critical:** Yes: KEV
- **CNA:** apple
- **Weakness (CWE):** [CWE-125](https://cwe.mitre.org/data/definitions/125.html)
- **Tags:** [Memory corruption](https://agentprime.io/advisories/tag/memory-corruption.md)
- **Technologies:** [Apple macOS](https://agentprime.io/advisories/technology/apple-macos.md) · [Apple Safari](https://agentprime.io/advisories/technology/apple-safari.md) · [Apple watchOS](https://agentprime.io/advisories/technology/apple-watchos.md) · [Apple iOS and iPadOS](https://agentprime.io/advisories/technology/apple-ios-and-ipados.md) · [Apple tvOS](https://agentprime.io/advisories/technology/apple-tvos.md)
- **Published:** 23 Jun 2023
- **Updated:** 21 Oct 2025
- **Reviewed by a person:** No

Published by the CVE Program (CNA: apple) at 23 Jun 2023, 00:00 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

## Critical

Critical, because:

- In CISA’s KEV catalogue since 22 May 2023: it is known to be exploited.

How we decide what’s critical: <https://agentprime.io/advisories/critical.md>

## Affected products, as the CNA wrote them

- Vendor: Apple. Product: macOS.
  - affected: `unspecified to before 13.4` (custom)
- Vendor: Apple. Product: Safari.
  - affected: `unspecified to before 16.5` (custom)
- Vendor: Apple. Product: watchOS.
  - affected: `unspecified to before 9.5` (custom)
- Vendor: Apple. Product: iOS and iPadOS.
  - affected: `unspecified to before 15.7` (custom)
- Vendor: Apple. Product: iOS and iPadOS.
  - affected: `unspecified to before 16.5` (custom)
- Vendor: Apple. Product: tvOS.
  - affected: `unspecified to before 16.5` (custom)

## Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

## Severity and exploitation

- 6.5 Medium, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N`, from ADP (CISA-ADP)

- **CISA KEV:** Listed since 22 May 2023: known to be exploited.
- **EPSS:** 0.14, the 96th percentile, on 8 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the CVE Program, published 23 Jun 2023. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2023-28204](https://www.cve.org/CVERecord?id=CVE-2023-28204)
- [NVD: CVE-2023-28204](https://nvd.nist.gov/vuln/detail/CVE-2023-28204)

### References from the CNA

- <https://support.apple.com/en-us/HT213758>
- <https://support.apple.com/en-us/HT213762>
- <https://support.apple.com/en-us/HT213764>
- <https://support.apple.com/en-us/HT213765>
- <https://support.apple.com/en-us/HT213757>
- <https://support.apple.com/en-us/HT213761>
- <https://security.gentoo.org/glsa/202401-04>

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.

## Check whether this affects you

This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it. Compare the affected versions above with what you run.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), `get_advisory` returns this record and `search_advisories` finds related ones. Setup: <https://agentprime.io/mcp.md>
- As JSON: <https://api.agentprime.io/v1/advisories/CVE-2023-28204>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2023-28204/>. Everything for agents: <https://agentprime.io/llms.txt>.